<nav class="main-header navbar navbar-expand navbar-white navbar-light">
    <!-- Left navbar links -->
    <ul class="navbar-nav">
        <li class="nav-item">
            <a class="nav-link" data-widget="pushmenu" href="#" role="button"><i class="fas fa-bars"></i></a>
        </li>
    </ul>
    <!-- Right navbar links -->
    <ul class="navbar-nav ml-auto">
        <li class="nav-item">
            <a class="nav-link" data-widget="control-sidebar" data-slide="true" href="javascript:;" role="button">
                <button type="button" id="logoutBtn" class="btn btn-block btn-danger btn-sm">退出登陆</button>
            </a>
        </li>
    </ul>
</nav>